. >> steve justice, director, appreciate it. >> thank you very much. >> thank you. >>> question for you, you look to save money on your next flight? go on a diet. one economist says airlines should charge people based upon their weight. is it legal? we're on the case next. >>> how about this, you weigh more, you pay more. this is a suggestion coming from the economic professor in norway. he says your weight should be factored into the price of a plane ticket. why? to cover the cost of extra fuel. the heavier the plane, the more fuel it takes to move, the more it costs you and me. here's part of the professor's so-called fat tax pricing. total weight, how much you and your luggage weigh together, you and your bags, you weigh 240 pounds, you have to pay twice that of a passenger weighing in at 120 pounds with his or her bags. but how would the airlines know how much you weigh? passengers would have to declare it or possibly airlines would weigh passengers before boarding. that would be embarrassing. cnn legal analyst sunny hostin. can you imagine? on the case with me. i know, i know. let